Image forming apparatus

ABSTRACT

An image forming apparatus, comprises a body housing, a drawer movable between an accommodated position and a drawn position, a drum cartridge including a photoconductor drum, a developing cartridge including a developing roller, and a belt located above the photoconductor drum, and the drawer is located at the accommodated position. The drum cartridge includes a moving member movable, with respect to the photoconductor drum, between (i) a first position which is a position at which the moving member is not opposed to the developing cartridge mounted on the drum cartridge and is opposed to a circumferential surface of the photoconductor drum and (ii) a second position which is a position at which the moving member is not opposed to the circumferential surface of the photoconductor drum and is opposed to the developing cartridge mounted on the drum cartridge.

CROSS REFERENCE TO RELATED APPLICATION

The present application claims priority from Japanese Patent ApplicationNo. 2020-169443, which was filed on Oct. 6, 2020, the disclosure ofwhich is herein incorporated by reference in its entirety.

BACKGROUND

The following disclosure relates to an image forming apparatus.

An image forming apparatus includes a body housing, a drawer, a drumcartridge, and a belt in related art. The drawer is movable between anaccommodated position and a drawn position. The drawer is accommodatedin the body housing in a state in which the drawer is located at theaccommodated position. The drawer is drawn out from the body housing ina state in which the drawer is located at the drawn position. The drumcartridge includes a photoconductor drum. The drum cartridge ismountable on the drawer in a state in which the drawer is located at thedrawn position. The belt is located above the photoconductor drum in astate in which the drum cartridge is mounted on the drawer and thedrawer is located at the accommodated position.

SUMMARY

In the image forming apparatus described above, a circumferentialsurface of the photoconductor drum is exposed in a state in which thedrum cartridge is mounted on the drawer and the drawer is located at thedrawn position.

Accordingly, the circumferential surface of the photoconductor drum maybe scratched during replacement work of the drum cartridge.

An aspect of the disclosure relates to an image forming apparatus and adrum cartridge capable of protecting a circumferential surface of aphotoconductor drum in a structure in which a belt is located above thephotoconductor drum in a state in which the drum cartridge is mounted ona drawer and the drawer is located at the accommodated position.

In one aspect of the disclosure, an image forming apparatus, comprises abody housing, a drawer movable between an accommodated position which isa position at which the drawer is accommodated in the body housing and adrawn position which is a position at which the drawer is drawn out fromthe body housing, a drum cartridge including a photoconductor drum andmountable on the drawer in a state in which the drawer is located at thedrawn position, a developing cartridge including a developing roller andmountable on the drum cartridge in a state in which the drum cartridgeis removed from the drawer, and a belt located above the photoconductordrum in a state in which the drum cartridge is mounted on the drawer andthe drawer is located at the accommodated position. The drum cartridgeincludes a moving member movable, with respect to the photoconductordrum, between (i) a first position which is a position at which themoving member is not opposed to the developing cartridge mounted on thedrum cartridge and is opposed to a circumferential surface of thephotoconductor drum and (ii) a second position which is a position atwhich the moving member is not opposed to the circumferential surface ofthe photoconductor drum and is opposed to the developing cartridgemounted on the drum cartridge.

BRIEF DESCRIPTION OF THE DRAWINGS

The objects, features, advantages, and technical and industrialsignificance of the present disclosure will be better understood byreading the following detailed description of the embodiments, whenconsidered in connection with the accompanying drawings, in which:

FIG. 1 is a schematic structural view of an image forming apparatus;

FIG. 2 is a view of the image forming apparatus illustrated in FIG. 1,illustrating a state in which a cover is located at an open position anda drawer is located at a second accommodated position;

FIG. 3 is a view of the image forming apparatus illustrated in FIG. 1,illustrating a state in which the cover is located at the open positionand the drawer is located at a drawn position;

FIG. 4 is a perspective view of a drum cartridge, illustrating a statein which a moving member is located at a first position;

FIG. 5A is a cross-sectional view of the drum cartridge illustrated inFIG. 4, illustrating a state in which the moving member is located atthe first position, a lock member is located at a lock-release position,and a pressing member is located at a press-releasing position;

FIG. 5B is a cross-sectional view of the drum cartridge illustrated inFIG. 5A, illustrating a state in which the moving member is located at asecond position, the lock member is located at a lock position, and thepressing member is located at a press position;

FIG. 6 is a perspective view of the drum cartridge illustrated in FIG.4, illustrating a state in which a drum cover is located at the secondposition;

FIG. 7 is a perspective view of a developing cartridge;

FIG. 8 is an explanatory view for explaining a first modification; and

FIG. 9 is an explanatory view for explaining a second modification.

EMBODIMENTS Outline of Image Forming Apparatus 1

An outline of an image forming apparatus 1 will be explained withreference to FIG. 1 to FIG. 3.

As illustrated in FIG. 1, the image forming apparatus 1 includes a bodyhousing 2, a cover 3, a sheet container 4, a drawer 5, a plurality ofdrum cartridges 6Y, 6M, 6C, and 6K, an exposing device 7, a plurality ofdeveloping cartridges 8Y, 8M, 8C, and 8K, a belt unit 9, a transferroller 10, and a fixing device 11.

Body Housing 2

The body housing 2 accommodates the sheet container 4, the drawer 5, theplurality of toner cartridges 6K, 6C, 6M, and 6Y, the exposing device 7,the plurality of developing cartridges 8Y, 8M, 8C, and 8K, the belt unit9, the transfer roller 10, and the fixing device 11. The body housing 2includes an opening 21.

Cover 3

The cover 3 is movable between a closed position (see FIG. 1) and anopen position (see FIG. 2). As illustrated in FIG. 1, when the cover 3is located at the closed position, the cover 3 closes the opening 21. Asillustrated in FIG. 2, when the cover is located at the open position,the opening 21 opens.

Sheet Container 4

As illustrated in FIG. 1, the sheet container 4 can contain a sheet S.The sheet S in the sheet container 4 is conveyed toward the transferroller 10.

Drawer 5

As illustrated in FIG. 1 to FIG. 3, the drawer 5 is movable between anaccommodated position (see FIG. 1) and a drawn position (see FIG. 3).

Specifically, as illustrated in FIG. 1 and FIG. 2, the drawer 5 movesfrom the accommodated position (see FIG. 1) to a second accommodatedposition (see FIG. 2) in conjunction with movement of the cover 3 fromthe closed position (see FIG. 1) to the open position (see FIG. 2). Thedrawer 5 is located at the accommodated position in a state in which thecover 3 is located at the closed position. The drawer 5 is located atthe second accommodated position in a state in which the cover 3 islocated at the open position. The entire of the drawer 5 is accommodatedin the body housing 2 in states in which the drawer is located at theaccommodated position and in which the drawer is located at the secondaccommodated position. When the drawer 5 moves from the accommodatedposition to the second accommodated position, the drawer 5 moves awayfrom the belt unit 9.

It is noted that the drawer 5 moves from the second accommodatedposition (see FIG. 2) to the accommodated position (see FIG. 1) inconjunction with the movement of the cover 3 from the open position (seeFIG. 2) to the closed position (see FIG. 1). When the drawer 5 movesfrom the second accommodated position to the accommodated position, thedrawer 5 comes close to the belt unit 9.

Then, as illustrated in FIG. 2 and FIG. 3, the drawer 5 is movablethrough the opening 21 between the second accommodated position (seeFIG. 2) and the drawn position (see FIG. 3) in the state in which thecover 3 is located at the open position. The drawer 5 is movable in adirection in which photoconductor drums 61Y, 61M, 61C, and 61K (seeFIG. 1) are arranged. The photoconductor drums 61Y, 61M, 61C, and 61Kwill be explained later. As illustrated in FIG. 3, at least a part ofthe drawer 5 is drawn out from the body housing 2 in a state in whichthe cover 3 is located at the open position and the drawer 5 is locatedat the drawn position. Drum Cartridges 6Y, 6M, 6C, and 6K

Each of the drum cartridges 6Y, 6M, 6C, and 6K is mountable on thedrawer 5 in a state in which the drawer 5 is located at the drawnposition. Each of the drum cartridges 6Y, 6M, 6C, and 6K is removablefrom the drawer 5 in a state in which each of the respective drumcartridges 6Y, 6M, 6C, and 6K is mounted on the drawer 5 and the drawer5 is located at the drawn position.

As illustrated in FIG. 1, the drum cartridge 6Y includes thephotoconductor drum 61Y and a charging device 62Y.

The photoconductor drum 61Y is rotatable about a drum axis A1. The drumaxis A1 extends in a first direction. The photoconductor drum 61Yextends in the first direction.

The charging device 62Y charges the photoconductor drum 61Y. Thecharging device 62Y is a charging roller. The charging device 62Y may bea scorotron type charging device.

Each of the drum cartridges 6M, 6C, and 6K is explained similarly to thedrum cartridge 6Y. Therefore, explanation for each of the drumcartridges 6M, 6C, and 6K is omitted.

Exposing Device 7

The exposing device 7 is located below the drawer 5 in the state inwhich the drawer 5 is located at the accommodated position. The exposingdevice 7 is located between the sheet container 4 and the drawer 5 inthe state in which the drawer 5 is located at the accommodated position.The exposing device 7 can expose each of circumferential surfaces of thephotoconductor drums 61Y, 61M, 61C, and 61K in a state in which the drumcartridges 6Y, 6M, 6C, and 6K are mounted on the drawer 5 and the drawer5 is located at the accommodated position. In the embodiment, theexposing device 7 is a laser scanner unit. The exposing device 7 may bean exposing head having an LED array.

Developing Cartridges 8Y, 8M, 8C, and 8K

The developing cartridge 8Y is mountable on the drum cartridge 6Y in astate in which the drum cartridge 6Y is removed from the drawer 5. Thedeveloping cartridge 8Y is removable from drum cartridge 6Y in a statein which the developing cartridge 8Y is mounted on the drum cartridge 6Yand the drum cartridge 6Y is removed from the drawer 5. It is incapableof removing the developing cartridge 8Y from the drum cartridge 6Y in astate in which the developing cartridge 8Y is mounted on the drumcartridge 6Y and the drum cartridge 6Y is mounted on the drawer 5.

The developing cartridge 8Y includes a toner container 81Y and adeveloping roller 82Y.

The toner container 81Y is capable of containing toner supplied to thephotoconductor drum 61Y. In other words, the developing cartridge 8Y iscapable of containing the toner supplied to the photoconductor drum 61Y.The toner container 81Y is located below the developing roller 82Y inthe state in which the developing cartridge 8Y is mounted on the drumcartridge 6Y and the drum cartridge 6Y is mounted on the drawer 5. Thetoner container 81Y is located below the photoconductor drum 61Y in thestate in which the developing cartridge 8Y is mounted on the drumcartridge 6Y and the drum cartridge 6Y is mounted on the drawer 5.

The developing roller 82Y is capable of supplying toner in thedeveloping cartridge 8Y to the photoconductor drum 61Y. The developingroller 82Y contacts the photoconductor drum 61Y in the state in whichthe developing cartridge 8Y is mounted on the drum cartridge 6Y. Thedeveloping roller 82Y may be capable of separating from thephotoconductor drum 61Y. The developing roller 82Y extends in the firstdirection in the state in which the developing cartridge 8Y is mountedon the drum cartridge 6Y. The developing roller 82Y is rotatable about adeveloping axis A2. The developing axis A2 extends in the firstdirection in the state in which the developing cartridge 8Y is mountedon the drum cartridge 6Y.

Each of the developing cartridges 8M, 8C, and 8K is explained similarlyto the developing cartridge 8Y. Therefore, explanation for each of thedeveloping cartridges 8M, 8C, and 8K is omitted.

Belt Unit 9

The belt unit 9 is located above the photoconductor drums 61Y, 61M, 61C,and 61K in the state in which the drum cartridges 6Y, 6M, 6C, and 6K aremounted on the drawer 5 and the drawer 5 is located at the accommodatedposition. The belt unit 9 includes a belt 91 and a plurality of transferrollers 92Y, 92M, 92C, and 92K. That is, the image forming apparatus 1includes the belt 91.

The belt 91 is an intermediate transfer belt. The belt 91 is locatedabove the photoconductor drums 61Y, 61M, 61C, and 61K in the state inwhich the drum cartridges 6Y, 6M, 6C, and 6K are mounted on the drawer 5and the drawer 5 is located at the accommodated position. Thephotoconductor drums 61Y, 61M, 61C, and 61K contact the belt 91 in thestate in which the drum cartridges 6Y, 6M, 6C, and 6K are mounted on thedrawer 5 and the drawer 5 is located at the accommodated position. Asillustrated in FIG. 2, the photoconductor drums 61Y, 61M, 61C, and 61Kare spaced apart from the belt 91 in a state in which the drumcartridges 6Y, 6M, 6C, and 6K are mounted on the drawer 5 and the drawer5 is located at the second accommodated position.

As illustrated in FIG. 1, the transfer roller 92Y transfers toner on thephotoconductor drum 61 to the belt 91 in the state in which the drumcartridges 6Y, 6M, 6C, and 6K are mounted on the drawer 5 and the drawer5 is located at the accommodated position. The transfer roller 92Mtransfers toner on the photoconductor drum 61M to the belt 91. Thetransfer roller 92C transfers toner on the photoconductor drum 61C tothe belt 91. The transfer roller 92K transfers toner on thephotoconductor drum 61K to the belt 91.

Transfer Roller 10

The transfer roller 10 contacts the belt 91. The sheet S which has beenaccommodated in the sheet container 4 passes between the belt 91 and thetransfer roller 10. At this time, the transfer roller 10 transfers toneron the belt 91 to the sheet S.

Fixing Device 11

The fixing device 11 heats and pressurizes the sheet S to which thetoner is transferred to thereby fix the toner on the sheet S. The sheetS having passed through the fixing device 11 is discharged to an uppersurface of the body housing 2.

Details of Drum Cartridge 6Y

Next, the details of the drum cartridge 6Y will be explained withreference to FIG. 4 to FIG. 6. As illustrated in FIG. 4, the drumcartridge 6Y includes, in addition to the photoconductor drum 61Y andthe charging device 62Y, a drum frame 63Y, a drum cleaner 64Y (see FIG.5A), and a moving member 65Y.

Drum Frame 63Y

The drum frame 63Y supports the photoconductor drum 61Y and the chargingdevice 62Y. The drum frame 63Y supports the developing cartridge 8Y inthe state in which the developing cartridge 8Y is mounted on the drumcartridge 6Y. The drum frame 63Y includes two drum side plates 631A,631B, two developing guides 632A, 632B, two developing guides 633A,633B, and two pressing members 634A, 634B. In other words, the drumcartridge 6Y has the developing guides 632A, 632B and the pressingmembers 634A, 634B.

Drum Side Plates 631A, 631B

The drum side plate 631A is located at one end portion of the drumcartridge 6Y in the first direction. The drum side plate 631A extends ina direction interesting the first direction. Preferably, the drum sideplate 631A extends in a direction orthogonal to the first direction. Thedrum side plate 631A has an outer surface S1 and an inner surface S2 inthe first direction. The inner surface S2 is located between the outersurface S1 and the drum side plate 631B in the first direction. The drumside plate 631A has a through hole 635A.

The through hole 635A receives a lock member 654A of the moving member65Y. The lock member 654A is an example of a first lock member. The lockmember 654A will be explained later. The through hole 635A is locatedbetween the developing guide 633A and an axis A5 of the moving member65Y. The axis A5 will be explained later. The through hole 635A extendsin a moving direction of the lock member 654A.

The drum side plate 631B is located at the other end portion of the drumcartridge 6Y in the first direction. The drum side plate 631B is spacedapart from the drum side plate 631A in the first direction. Thedeveloping cartridge 8Y is located between the first side plate 631A andthe drum side plate 631B in the first direction in the state in whichthe developing cartridge 8Y is mounted on the drum cartridge 6Y. Thedrum side plate 631B extends in a direction intersecting the firstdirection. Preferably, the drum side plate 631B extends in a directionorthogonal to the first direction. The drum side plate 631B has an outersurface S3 and an inner surface S4 in the first direction. The innersurface S4 is located between the outer surface S3 and the drum sideplate 631A in the first direction. The drum side plate 631B has athrough hole 635B.

The through hole 635B receives a lock member 654B of the moving member65Y. The lock member 654B will be explained later. The through hole 635Bis located between the developing guide 633B and the axis A5 of themoving member 65Y The through hole 635B extends in a moving direction ofthe lock member 654B.

Developing Guides 632A, 632B

The developing guides 632A, 632B guide the mounting of the developingcartridge 8Y with respect to the drum cartridge 6Y.

The developing guide 632A is located at the inner surface S2 of the drumside plate 631A. The developing guide 632A extends in a directionintersecting the first direction. Preferably, the developing guide 632Aextends in a direction orthogonal to the first direction. A protrusion84A (see FIG. 5A) of the developing cartridge 8Y is fitted into thedeveloping guide 632A in the state in which the developing cartridge 8Yis mounted on the drum cartridge 6Y. The protrusion 84A will beexplained later. The developing guide 632A is a groove. The developingguide 632A may also be a rib.

The developing guide 632B is located at the inner surface S4 of the drumside plate 631B. The developing guide 632B extends in a directionintersecting the first direction. Preferably, the developing guide 632Bextends in a direction orthogonal to the first direction. A protrusion84B (see FIG. 7) of the developing cartridge 8Y is fitted into thedeveloping guide 632B in the state in which the developing cartridge 8Yis mounted on the drum cartridge 6Y. The protrusion 84B will beexplained later. The developing guide 632B is a groove. The developingguide 632B may also be a rib.

Developing Guides 633A, 633B

The developing guides 633A, 633B guide the mounting of the developingcartridge 8Y with respect to the drum cartridge 6Y together with thedeveloping guides 632A, 632B.

The developing guide 633A is provided at the drum side plate 631A. Thedeveloping guide 633A is located on an opposite side of the drum sideplate 631B with respect to the developing guide 632A in the firstdirection. The developing guide 633A is located between the developingguide 632A and the outer surface S1 of the drum side plate 631A in thefirst direction.

The developing guide 633A extends in a direction intersecting the firstdirection. Preferably, the developing guide 633A extends in a directionorthogonal to the first direction. The developing guide 633A extends ina direction intersecting the developing guide 632A. A part of thedeveloping guide 633A overlaps with the developing guide 632A whenviewed from the first direction.

A protrusion 83A (see FIG. 7) of the developing cartridge 8Y is fittedinto the developing guide 633A in the state in which the developingcartridge 8Y is mounted on the drum cartridge 6Y. The protrusion 83Awill be explained later. The developing guide 633A is a groove. Thedeveloping guide 633A may also be a rib.

The developing guide 633B is provided at the drum side plate 631B. Thedeveloping guide 633B is located on an opposite side of the drum sideplate 631A with respect to the developing guide 632B in the firstdirection. The developing guide 633B is located between the developingguide 632B and the outer surface S3 of the drum side plate 631B in thefirst direction.

The developing guide 633B extends in a direction intersecting the firstdirection. Preferably, the developing guide 633B extends in a directionorthogonal to the first direction. The developing guide 633B extends ina direction intersecting the developing guide 632B. A part of thedeveloping guide 633B overlaps with the developing guide 632B whenviewed from the first direction.

A protrusion 83B (see FIG. 7) of the developing cartridge 8Y is fittedinto the developing guide 633B in the state in which the developingcartridge 8Y is mounted on the drum cartridge 6Y. The protrusion 83Bwill be explained later. The developing guide 633B is a groove. Thedeveloping guide 633B may also be a rib.

Pressing Members 634A, 634B

The pressing member 634A is located inside the drum side plate 631A. Thepressing member 634A is located between the developing guide 633A andthe outer surface S1 in the first direction. The pressing member 634A ismovable between a pressing position (see FIG. 5B) and a press-releaseposition (see FIG. 5A). The pressing member 634A is pivotable about anaxis A3 between the pressing position and the press-releasing position.The axis A3 extends in the first direction.

As illustrated in FIG. 5B, the pressing member 634A presses theprotrusion 83A of the developing cartridge 8Y toward the photoconductordrum 61Y in a state in which the developing cartridge 8Y is mounted onthe drum cartridge 6Y and the pressing member 634A is located at thepressing position.

On the other hand, the pressing member 634A is spaced apart from theprotrusion 83A of the developing cartridge 8Y in a stated where thedeveloping cartridge 8Y is mounted on the drum cartridge 6Y and thepressing member 634A is located at the press-release position asillustrated in FIG. 5A. Accordingly, the pressing member 634A releasespressing of the developing cartridge 8Y with respect to the protrusion83A.

The pressing member 634A includes a shaft 6341, a body portion 6342, anda protrusion 6343.

The shaft 6341 extends in the first direction along the axis A3.

The body portion 6342 extends from the shaft 6341. The body portion 6342extends in a direction intersecting the first direction. Preferably, thebody portion 6342 extends in a direction orthogonal to the firstdirection. The body portion 6342 has a flat-plate shape. As illustratedin FIG. 5B, the body portion 6342 contacts the protrusion 83A of thedeveloping cartridge 8Y in the state in which the pressing member 634Ais located at the press position.

The protrusion 6343 extends from the shaft 6341. The protrusion 6343extends in a direction intersecting the first direction. Preferably, theprotrusion 6343 extends in a direction orthogonal to the firstdirection. As illustrated in FIG. 5A, the protrusion 6343 contacts apress-releasing member 655A of the moving member 65Y in a state in whichthe moving member 65Y is located at a first position and the pressingmember 634A is located at the press-releasing position. The firstposition of the moving member 65Y and the press-releasing member 655Awill be explained later.

As illustrated in FIG. 4, the pressing member 634B is located inside thedrum side plate 631B. The pressing member 634B is located between thedeveloping guide 633B and the outer surface S3 in the first direction.The pressing member 634B is movable between a second pressing position(see FIG. 6) and a second press-release position (see FIG. 4). Thepressing member 634B is pivotable about an axis A4 between the secondpressing position and the second press-releasing position. The axis A4extends in the first direction.

The pressing member 634B presses the protrusion 83B (see FIG. 7) of thedeveloping cartridge 8Y toward the photoconductor drum 61Y in a state inwhich the developing cartridge 8Y is mounted on the drum cartridge 6Yand the pressing member 634B is located at the press position.

On the other hand, the pressing member 634B releases the pressing of thedeveloping cartridge 8Y with respect to the protrusion 83B in a state inwhich the developing cartridge 8Y is mounted on the drum cartridge 6Yand the pressing member 634B is located at the press-releasing position.

Explanation for the pressing member 634B is the same as the explanationfor the pressing member 634A. Therefore, the explanation for thepressing member 634B is omitted.

When the pressing member 634A presses the protrusion 83A and thepressing member 634B presses the protrusion 83B in the state in whichthe developing cartridge 8Y is mounted on the drum cartridge 6Y, thedeveloping roller 82Y (see FIG. 1) is pressed onto the photoconductordrum 61Y.

Drum Cleaner 64Y

As illustrated in FIG. 5A, the drum cleaner 64Y cleans thecircumferential surface of the photoconductor drum 61Y. The drum cleaner64Y includes a cleaning housing 641Y, a cleaning member 642Y, and ascrew 643Y.

As illustrated in FIG. 4, the cleaning housing 641Y is located betweenthe drum side plate 631A and the drum side plate 631B in the firstdirection. The cleaning housing 641Y extends in the first direction. Oneend portion of the cleansing housing 641Y in the first direction isconnected to the drum side plate 631A. The other end portion of thecleaning housing 641Y in the first direction is connected to the drumside plate 631B. The cleaning housing 641Y is capable of containingwaste toner.

As illustrated in FIG. 5A, the cleaning housing 641Y includes an opening6411Y The cleaning housing 641Y is located below the photoconductor drum61Y in a state in which the drum cartridge 6Y is put on a horizontalsurface H. The cleaning housing 641Y is opposed to the horizontalsurface H in the state in which drum cartridge 6Y is put on thehorizontal surface H. The cleaning housing 641Y has a bottom surface 60of the drum cartridge 6Y. The bottom surface 60 of the drum cartridge 6Yis opposed to the horizontal surface H in the state in which drumcartridge 6Y is put on the horizontal surface H. The charging device 62Yis located between the cleaning housing 641Y and the photoconductor drum61Y.

The cleaning member 642Y cleans the circumferential surface of thephotoconductor drum 61Y. The cleaning member 642Y is mounted to thecleaning housing 641Y An edge of the cleaning member 642 contacts thecircumferential surface of the photoconductor drum 61Y. Waste tonercleaned from the circumferential surface of the photoconductor drum 61Yby the cleaning member 642Y enters the cleaning housing 641Y through theopening 6411Y.

The screw 643Y is located inside the cleaning housing 641. The screw643Y conveys the waste toner inside the cleaning housing 641Y in thefirst direction. The screw 643Y is an auger screw in the embodiment. Thescrew 643Y extends in the first direction. The screw 643Y may be ashaftless screw.

Moving Member 65Y

As illustrated in FIG. 4 and FIG. 6, the moving member 65Y is movablewith respect to the photoconductor drum 61Y between the first position(see FIG. 4) and a second position (see FIG. 6). The moving member 65Yis rotatable about the axis A5 between the first position and the secondposition. The axis A5 extends in the first direction.

As illustrated in FIG. 4, the moving member 65Y is opposed to thecircumferential surface of the photoconductor drum 61Y in a state inwhich the moving member 65Y is located at the first position.Accordingly, it is possible to protect the circumferential surface ofthe photoconductor drum 61Y in the state in which the moving member 65Yis located at the first position.

As illustrated in FIG. 5A, the moving member 65Y is not opposed to thedeveloping cartridge 8Y which is mounted on the drum cartridge 6Y in thestate in which the moving member 65Y is located at the first position.Accordingly, the developing cartridge 8Y is removable from the drumcartridge 6Y in the state in which the developing cartridge 8Y ismounted on the drum cartridge 6Y and the moving member 65Y is located atthe first position.

The moving member 65Y is located between the drum cleaner 64Y and thedeveloping cartridge 8Y in the state in which the developing cartridge8Y is mounted on the drum cartridge 6Y and the moving member 65Y islocated at the first position. The moving member 65Y is located betweenthe drum cleaner 64Y and the developing roller 82Y in the state in whichthe developing cartridge 8Y is mounted on the drum cartridge 6Y and themoving member 65Y is located at the first position. Accordingly, thecircumferential surface of the photoconductor drum 61Y is protected bybeing covered with the developing cartridge 8Y mounted on the drumcartridge 6Y and the moving member 65Y located at the first position.

As illustrated in FIG. 6, the moving member 65Y is not opposed to thecircumferential surface of the photoconductor drum 61Y in a state inwhich the moving member 65Y is located at the second position.

Accordingly, when the drawer 5 is located at the accommodated positionin the state in which drum cartridge 6Y is mounted on the drawer 5 andthe moving member 65Y is located at the second position, thecircumferential surface of the photoconductor drum 61Y is allowed tocontact the belt 91.

As illustrated in FIG. 5B, the moving member 65Y is opposed to thedeveloping cartridge 8Y mounted on the drum cartridge 6Y in the state inwhich the moving member 65Y is located at the second position.Specifically, the moving member 65 is opposed to the developingcartridge 8Y in a direction in which the developing guide 632A extendsin the state in which the developing cartridge 8Y is mounted on the drumcartridge 6Y and the moving member 65Y is located at the secondposition. Accordingly, it is incapable of removing the developingcartridge 8Y from the drum cartridge 6Y in the state in which thedeveloping cartridge 8Y is mounted on the drum cartridge 6Y and themoving member 65Y is located at the second position.

The moving member 65Y is located on an opposite side of the drum cleaner64Y with respect to the photoconductor drum 61Y in the state in whichthe moving member 65Y is located at the second position.

As illustrated in FIG. 3, the moving member 65Y is movable between thefirst position and the second position in a state in which thedeveloping cartridge 8Y is mounted on the drum cartridge 6Y, the drumcartridge 6Y is mounted on the drawer 5, and the drawer 5 is located atthe drawn position. Preferably, the moving member 65Y is located at thefirst position in the state in which the developing cartridge 8Y ismounted on the drum cartridge 6Y, the drum cartridge 6Y is mounted onthe drawer 5, and the drawer 5 is located at the drawn position.

As illustrated in FIG. 1, the moving member 65Y is located at the secondposition in a state in which developing cartridge 8Y is mounted on thedrum cartridge 6Y, the drum cartridge 6Y is mounted on the drawer 5, andthe drawer 5 is located at the accommodated position.

As illustrated in FIG. 4, the moving member 65Y includes two shafts650A, 650B, two arms 651A, 651B, a handle 652, a drum cover 653, twolock members 654A, 654B, two press-releasing members 655A (see FIG. 5A),655B. The handle is an example of a first handle. In other words, thedrum cartridge 6Y includes the press-releasing members 655A, 655B. It isnoted that the press-releasing member 655B is not illustrated.

Shafts 650A, 650B

The shaft 650A is supported by the drum side plate 631A. The shaft 650Aextends in the first direction along the axis A5.

The shaft 650B is supported by the drum side plate 631B. The shaft 650Bis spaced apart from the shaft 650A in the first direction. The shaft650B extends in the first direction along the axis A5.

Arms 651A, 651B

The arm 651A is located at the outer surface S1 of the drum side plate631A. The arm 651A is located at one end portion of the moving member65Y in the first direction. The arm 651A is rotatable about the axis A5.The arm 651A extends from the shaft 650A. The arm 651A extends in adirection intersecting the first direction. Preferably, the arm 651Aextends in a direction orthogonal to the first direction.

The arm 651B is located at the outer surface S3 of the drum side plate631B. The arm 651B is located at the other end portion of the drum cover653 in the first direction. The arm 651A is spaced apart from the arm651B in the first direction. The arm 651B is rotatable about the axisA5. The arm 651B extends from the shaft 650B. The arm 651B extends in adirection intersecting the first direction. Preferably, the arm 651Bextends in a direction orthogonal to the first direction.

Handle 652

The handle 652 extends in the first direction. One end portion of thehandle 652 in the first direction is connected to the arm 651A. Theother end portion of the handle 652 in the first direction is connectedto the arm 651B.

As illustrated in FIG. 3, a user can grasp the handle 652 and pull outthe drum cartridge 6Y from the drawer 5 in the state in which the drumcartridge 6Y is mounted on the drawer 5 and the drawer 5 is located atthe drawn position.

Drum Cover 653

As illustrated in FIG. 4, the drum cover 653 is located between the arm651A and the arm 651B in the first direction. The drum cover 653 extendsin the first direction. The drum cover 653 covers a part of thecircumferential surface of the photoconductor drum 61Y in the state inwhich the moving member 65Y is located at the first position. The drumcover 653 extends along the circumferential surface of thephotoconductor drum 61Y in the state in which the moving member 65Y islocated at the first position.

Lock Members 654A, 654B

As illustrated in FIG. 4, the lock member 654A extends from the arm651A. The lock member 654A may be mounted to the arm 651A. The lockmember 654A extends in the first direction. The lock member 654A islocated inside the through hole 635A.

As illustrated in FIG. 5A and FIG. 5B, the lock member 654A is locatedbetween a lock position (see FIG. 5B) and a lock-release position (seeFIG. 5A).

As illustrated in FIG. 5B, the lock member 654A is located at the lockposition in the state in which the developing cartridge 8Y is mounted onthe drum cartridge 6Y and the moving member 65Y is located at the secondposition. The lock member 654A locks the developing cartridge 8Y to thedrum cartridge 6Y in the state in which the lock member 654A is locatedat the lock position.

To lock the developing cartridge 8Y to the drum cartridge 6Y is toprevent the developing cartridge 8Y from being removed from the drumcartridge 6Y. The lock member 654A is located inside the developingguide 632A in the state in which the lock member 654A is located at thelock position. The lock member 654A is opposed to the protrusion 84A ofthe developing cartridge 8Y in a direction in which the developing guide632A extends in the state in which the developing cartridge 8Y ismounted on the drum cartridge 6Y and the lock member 654A is located atthe lock position. Accordingly, when the developing cartridge 8Y movesin the direction in which the developing guide 632A extends in the statein which the developing cartridge 8Y is mounted on the drum cartridge 6Yand the lock member 654A is located at the lock position, the protrusion84A of the developing cartridge 8Y comes into contact with the lockmember 654A. Accordingly, it is possible to prevent the developingcartridge 8Y from being removed from the drum cartridge 6Y.

On the other hand, the lock member 654A is located at the lock-releaseposition in the state in which the developing cartridge 8Y is mounted onthe drum cartridge 6Y and the moving member 65Y is located at the firstposition as illustrated in FIG. 5A. The lock member releases the lockingof the developing cartridge with respect to the drum cartridge in thestate in which the lock member is located at the lock-release position.The lock member 654A is removed from the developing guide 632A in thestate in which the lock member 654A is located at the lock-releaseposition. Accordingly, the developing cartridge 8Y becomes removablefrom the drum cartridge 6Y.

As illustrated in FIG. 4, the lock member 654B extends from the arm651B. The lock member 654B is spaced apart from the lock member 654A inthe first direction. The lock member 654B may be mounted to the arm651B. The lock member 654B extends in the first direction. The lockmember 654B is located inside the through hole 635B.

Explanation for the lock member 654B is the same as the explanation forthe lock member 654A. That is, the lock member 654B is located at asecond lock position (see FIG. 6) in the state in which the developingcartridge 8Y is mounted on the drum cartridge 6Y and the moving member65Y is located at the second position. The lock member 654B locks thedeveloping cartridge 8Y to the drum cartridge 6Y in a state in which thelock member 654B is located at the second lock position. On the otherhand, the lock member 654B is located at a second lock-release position(see FIG. 4) in the state in which the developing cartridge 8Y ismounted on the drum cartridge 6Y and the moving member 65Y is located atthe first position. The lock member 654B releases the locking of thedeveloping cartridge 8Y with respect to the drum cartridge 6Y in a statein which the lock member 654B is located at the second lock-releaseposition.

Press-Releasing Members 655A, 655B

As illustrated in FIG. 5A, the press-releasing member 655A is locatedinside the drum side plate 631A. The press-releasing member 655A extendsfrom the shaft 650A of the moving member 65Y. The press-releasing member655A extends in a direction intersecting the first direction.Preferably, the press-releasing member 655A extends in a directionorthogonal to the first direction.

The press-releasing member 655A causes the pressing member 634A to belocated at the press-release position in the state in which the movingmember 65Y is located at the first position. Specifically, thepress-releasing member 655A presses the protrusion 6343 of the pressingmember 634A in a direction in which the pressing member 634A pivots fromthe press position to the press-release position in conjunction with themovement of the moving member 65Y from the second position (see FIG. 5B)to the first position (see FIG. 5A). Then, the pressing member 634Apivots from the press position to the press-releasing position.

On the other hand, as illustrated in FIG. 5B, the press-releasing member655A allows the pressing member 634A to be located at the press positionin the state in which the moving member 65Y is located at the secondposition. Specifically, the press-releasing member 655A is moved fromthe protrusion 6343 of the pressing member 634A in conjunction with themovement of the moving member 65Y from the first position (see FIG. 5A)to the second position (see FIG. 5B). Then, the pressing member 634Apivots from the press-release position to the press position.

Explanation for the not-illustrated press-releasing member 655B is thesame as the explanation for the press-releasing member 655A. Thepress-releasing member 655B is located inside the drum side plate 631B(see FIG. 4). The press-releasing member 655B extends from the shaft650B (see FIG. 4) of the moving member 65Y. The press-releasing member655B extends in a direction intersecting the first direction.Preferably, the press-releasing member 655B extends in a directionorthogonal to the first direction. The press-releasing member 655Bcauses the pressing member 634B (see FIG. 4) to be located at thepress-release position in the state in which the moving member 65Y islocated at the first position. On the other hand, the press-releasingmember 655B allows the pressing member 634B to be located at the pressposition in the state in which the moving member 65Y is located at thesecond position.

Details of Developing Cartridge 8Y

Next, the details of the developing cartridge 8Y will be explained withreference to FIG. 7.

The developing cartridge 8Y includes, in addition to the abovedeveloping roller 82Y, a developing housing 80Y, two protrusions 83A,83B, two protrusions 84A (see FIG. 5A), 84B, a second handle 85Y.

Developing Housing 80Y

The developing housing 80Y includes the toner container 81Y. Thedeveloping housing 80Y extends in a direction in which the developingaxis A2 extends. The developing housing 80Y has one outer surface S11and the other outer surface S12 in the direction in which the developingaxis A2 extends.

Protrusions 83A, 83B

The protrusion 83A is located at the outer surface S11 of the developinghousing 80Y. The protrusion 83A extends in the first direction. Theprotrusion 83A extends along the developing axis A2. The protrusion 83Aextends from the outer surface S11 of the developing housing 80Y. Theprotrusion 83A may be mounted to the outer surface S11 of the developinghousing 80Y. The protrusion 83A may be a shaft of the developing roller82Y. The protrusion 83A is fitted into the developing guide 633A (seeFIG. 4) in the state in which the developing cartridge 8Y is mounted onthe drum cartridge 6Y.

The protrusion 83B is located at the outer surface S12 of the developinghousing 80Y. The protrusion 83B extends in the first direction. Theprotrusion 83B extends along the developing axis A2. The protrusion 83Bextends from the outer surface S12 of the developing housing 80Y. Theprotrusion 83B may be mounted to the outer surface S12 of the developinghousing 80Y. The protrusion 83B may be the shaft of the developingroller 82Y. The protrusion 83B is fitted into the developing guide 633B(see FIG. 4) in the state in which the developing cartridge 8Y ismounted on the drum cartridge 6Y.

Protrusions 84A, 84B

The protrusion 84A (see FIG. 5A) is located at the outer surface S11 ofthe developing housing 80Y. The protrusion 84A is spaced apart from theprotrusion 83A. The protrusion 84A extends in the first direction. Theprotrusion 84A extends from the outer surface S11 of the developinghousing 80Y. The protrusion 84A may be mounted to the outer surface S11of the developing housing 80Y. The protrusion 84A is fitted into thedeveloping guide 632A (see FIG. 5A) in the state in which the developingcartridge 8Y is mounted on the drum cartridge 6Y.

The protrusion 84B is located at the outer surface S12 of the developinghousing 80Y. The protrusion 84B is spaced apart from the protrusion 83B.The protrusion 84B extends in the first direction. The protrusion 84Bextends from the outer surface S12 of the developing housing 80Y. Theprotrusion 84B may be mounted to the outer surface S12 of the developinghousing 80Y. The protrusion 84B is fitted into the developing guide 632B(see FIG. 4) in the state in which the developing cartridge 8Y ismounted on the drum cartridge 6Y.

Second Handle 85Y

The second handle 85Y is located at a center portion of the developinghousing 80Y in the direction in which the developing axis A2 extends.The second handle 85Y is located between the outer surface S11 and theouter surface S12 in the direction in which the developing axis A2extends. The second handle 85Y is mounted to the developing housing 80Y.The second handle 85Y is pivotable with respect to the developinghousing 80Y. The user can carry the developing cartridge 8Y by graspingthe second handle 85Y.

As illustrated in FIG. 1, the second handle 85Y is located at a positionbelow the handle 652 in the state in which the developing cartridge 8Yis mounted on the drum cartridge 6Y and the drum cartridge 6Y is mountedon the drawer 5. Accordingly, the user can grasp the handle 652 withouthesitation about which of the handle 652 and the second handle 85Yshould be grasped in the state in which the developing cartridge 8Y ismounted on the drum cartridge 6Y, the drum cartridge 6Y is mounted onthe drawer 5, and the drawer 5 is located at the drawn position.

Operation and Effect

According to the image forming apparatus 1, by locating the movingmember 65Y at the first position in the state in which the drumcartridge 6Y is mounted on the drawer 5 and the drawer 5 is located atthe drawn position as illustrated in FIG. 3, thereby it is possible toprotect the circumferential surface of the photoconductor drum 61Y bythe moving member 65Y.

Moreover, according to the image forming apparatus 1, as illustrated inFIG. 5B, the moving member 65Y is opposed to the developing cartridge 8Ymounted on the drum cartridge 6Y in the state in which the moving member65Y is located at the second position.

Accordingly, it is possible to suppress the removal of the developingcartridge 8Y from the drum cartridge 6Y in a state in which the movingmember 65Y is not located at the first position.

As a result, when the developing cartridge 8Y is removed from the drumcartridge 6Y, it is possible to certainly locate the moving member 65Yat the first position and to thereby protect the circumferential surfaceof the photoconductor drum 61Y.

According to the image forming apparatus 1, as illustrated in FIG. 5B,the moving member 65Y is opposed to the developing cartridge 8Y in thedirection in which the developing guide 632A extends in the state inwhich the developing cartridge 8Y is mounted on the drum cartridge 6Yand the moving member 65Y is located at the second position.

Accordingly, it is possible to further suppress the removal of thedeveloping cartridge 8Y from the drum cartridge 6Y in the state in whichthe moving member 65Y is not located at the first position.

According to the image forming apparatus 1, the moving member 65Y ispreferably located at the first position in the state in which thedeveloping cartridge 8Y is mounted on the drum cartridge 6Y, the drumcartridge 6Y is mounted on the drawer 5, and the drawer 5 is located atthe drawn position as illustrated in FIG. 3.

Accordingly, it is possible to protect the circumferential surface ofthe photoconductor drum 61Y in the state in which the developingcartridge 8Y is mounted on the drum cartridge 6Y, the drum cartridge 6Yis mounted on the drawer 5, and the drawer 5 is located at the drawnposition.

On the other hand, as illustrated in FIG. 1, the moving member 65Y islocated at the second position in the state in which the developingcartridge 8Y is mounted on the drum cartridge 6Y, the drum cartridge 6Yis mounted on the drawer 5, and the drawer 5 is located at theaccommodated position.

Accordingly, the circumferential surface of the photoconductor drum 61Yis allowed to contact the belt 91 in the state in which developingcartridge 8Y is mounted on the drum cartridge 6Y, the drum cartridge 6Yis mounted on the drawer 5, and the drawer 5 is located at theaccommodated position.

According to the image forming apparatus 1, as illustrated in FIG. 4,the moving member 65Y includes the drum cover 653. The drum cover 653covers the circumferential surface of the photoconductor drum 61Y in thestate in which the moving member 65Y is located at the first position.

Accordingly, it is possible to protect the circumferential surface ofthe photoconductor drum 61Y more certainly.

According to the image forming apparatus 1, as illustrated in FIG. 3,the second handle 85Y is located at the position below the handle 652 inthe state in which the developing cartridge 8Y is mounted on the drumcartridge 6Y and the drum cartridge 6Y is mounted on the drawer 5.

Accordingly, the user can grasp the handle 652 without hesitation aboutwhich of the handle 652 and the second handle 85Y should be grasped inthe state in which the developing cartridge 8Y is mounted on the drumcartridge 6Y, the drum cartridge 6Y is mounted on the drawer 5, and thedrawer 5 is located at the drawn position.

According to the image forming apparatus 1, as illustrated in FIG. 4,the moving member 65Y includes the lock member 654A. as illustrated inFIG. 5B, the lock member 654A locks the developing cartridge 8Y to thedrum cartridge 6Y in the state in which the developing cartridge 8Y ismounted on the drum cartridge 6Y and the moving member 65Y is located atthe second position.

Accordingly, it is possible to further suppress the removal of thedeveloping cartridge 8Y from the drum cartridge 6Y in the state in whichthe moving member 65Y is not located at the first position by the lockmember 654A.

According to the image forming apparatus 1, as illustrated in FIG. 4,the moving member 65Y further includes the lock member 654B. The lockmember 654B locks the developing cartridge 8Y to the drum cartridge 6Yin the state in which the developing cartridge 8Y is mounted on the drumcartridge 6Y and the moving member 65Y is located at the secondposition.

Accordingly, it is possible to further suppress the removal of thedeveloping cartridge 8Y from the drum cartridge 6Y by the lock member654A and the lock member 654B in the state in which the moving member65Y is not located at the first position.

According to the image forming apparatus 1, as illustrated in FIG. 5A,the drum cartridge 6Y includes the press-releasing member 655A. Thepress-releasing member 655A causes the pressing member 634A to belocated at the press-release position in the state in which the movingmember 65Y is located at the first position.

Accordingly, by locating the moving member 65Y at the first position,thereby it is possible to release the pressing of the developingcartridge 8Y with respect to the photoconductor drum 61Y.

As a result, it is possible to remove the developing cartridge 8Y fromthe drum cartridge 6Y easily in the state in which the moving member 65Yis allowed to be located at the first position.

Modification

Modifications will be explained with reference to FIG. 8 and FIG. 9. Inthe modification, the same symbols are attached to the same componentsas those of the above embodiment, and explanation thereof is omitted.

As illustrated in FIG. 8, the drum cartridge 6Y may include a spring100. The spring 100 presses, toward the first position, the movingmember 65Y located at the second position. The spring 100 is, forexample, a torsion spring. One end of the spring 100 is fixed to thedrum side plate 631B. The other end of the spring 100 is fixed to thearm 651B of the moving member 65Y.

According to the modification, it is possible to move the moving member65Y from the second position to the first position by the force of thespring 100 without executing the operation of moving the moving member65Y from the second position to the first position.

As a result, it is possible to smoothly perform replacement work of thedeveloping cartridge 8Y or the drum cartridge 6Y.

As illustrated in FIG. 9, the moving member 65Y may move from the firstposition to the second position in conjunction with the movement of thedrawer 5 from the drawn position to the accommodated position.Specifically, the moving member 65Y may move from the first position tothe second position by contacting an inclined surface 110 of the bodyhousing 2 when the drawer 5 moves from the drawn position to theaccommodated position. The inclined surface 110 is located between thebelt unit 9 and the cover 3 in the moving direction of the drawer 5.

According to the modification, it is possible to move the moving member65Y from the first position to the second position by the operation ofmoving the drawer 5 from the drawn position to the accommodated positionwith a simple structure without performing the work of moving the movingmember 65Y from the first position to the second position.

As a result, it is possible to smoothly perform replacement work of thedeveloping cartridge 8Y or the drum cartridge 6Y.

What is claimed is:
 1. An image forming apparatus, comprising: a bodyhousing; a drawer movable between an accommodated position which is aposition at which the drawer is accommodated in the body housing and adrawn position which is a position at which the drawer is drawn out fromthe body housing; a drum cartridge including a photoconductor drum andmountable on the drawer in a state in which the drawer is located at thedrawn position; a developing cartridge including a developing roller andmountable on the drum cartridge in a state in which the drum cartridgeis removed from the drawer; and a belt located above the photoconductordrum in a state in which the drum cartridge is mounted on the drawer andthe drawer is located at the accommodated position, wherein the drumcartridge includes a moving member movable, with respect to thephotoconductor drum, between (i) a first position which is a position atwhich the moving member is not opposed to the developing cartridgemounted on the drum cartridge and is opposed to a circumferentialsurface of the photoconductor drum and (ii) a second position which is aposition at which the moving member is not opposed to thecircumferential surface of the photoconductor drum and is opposed to thedeveloping cartridge mounted on the drum cartridge.
 2. The image formingapparatus according to claim 1, wherein the drum cartridge includes adeveloping guide that guides mounting of the developing cartridge withrespect to the drum cartridge, and wherein the moving member is opposedto the developing cartridge in a direction in which the developing guideextends in a state in which the developing cartridge is mounted on thedrum cartridge and the moving member is located at the second position.3. The image forming apparatus according to claim 1, wherein the movingmember is located at the first position in a state in which thedeveloping cartridge is mounted on the drum cartridge, the drumcartridge is mounted on the drawer, and the drawer is located at thedrawn position, and wherein the moving member is located at the secondposition in a state in which the developing cartridge is mounted on thedrum cartridge, the drum cartridge is mounted on the drawer, and thedrawer is located at the accommodated position.
 4. The image formingapparatus according to claim 1, wherein the moving member moves from thefirst position to the second position in conjunction with the movementof the drawer from the drawn position to the accommodated position. 5.The image forming apparatus according to claim 1, wherein the movingmember moves from the first position to the second position bycontacting the body housing when the drawer moves from the drawnposition to the accommodated position.
 6. The image forming apparatusaccording to claim 1, wherein the drum cartridge includes a spring thatpresses the moving member located at the second position toward thefirst position.
 7. The image forming apparatus according to claim 1,wherein the drum cartridge further includes a drum cleaner that cleansthe photoconductor drum, and wherein the moving member is located on anopposite side of the drum cleaner with respect to the photoconductordrum in a state in which the moving member is located at the secondposition.
 8. The image forming apparatus according to claim 7, whereinthe moving member is located between the drum cleaner and the developingroller in a state in which the developing cartridge is mounted on thedrum cartridge and the moving member is located at the first position.9. The image forming apparatus according to claim 1, wherein the movingmember includes a drum cover that covers the circumferential surface ofthe photoconductor drum in a state in which the moving member is locatedat the first position.
 10. The image forming apparatus according toclaim 1, wherein the moving member includes a first handle.
 11. Theimage forming apparatus according to claim 10, wherein the first handleis used when the drum cartridge is removed from the drawer.
 12. Theimage forming apparatus according to claim 11, wherein the developingcartridge further includes a second handle located at a lower positionthan the first handle in the state in which the developing cartridge ismounted on the drum cartridge and the drum cartridge is mounted on thedrawer.
 13. The image forming apparatus according to claim 1, whereinthe moving member further includes a first lock member, wherein thefirst lock member is located at a lock position at which the first lockmember locks the developing cartridge to the drum cartridge in the statein which the developing cartridge is mounted on the drum cartridge andthe moving member is located at the second position, and wherein thefirst lock member is located at a lock-release position at which thefirst lock member releases the lock of the developing cartridge withrespect to the drum cartridge in the state in which the developingcartridge is mounted on the drum cartridge and the moving member islocated at the first position.
 14. The image forming apparatus accordingto claim 13, wherein the photoconductor drum is rotatable about a drumaxis extending in a first direction, wherein the moving member furtherincludes a second lock member spaced apart from the first lock member inthe first direction, wherein the second lock member is located at asecond lock position at which the second lock member locks thedeveloping cartridge to the drum cartridge in the state in which thedeveloping cartridge is mounted on the drum cartridge and the movingmember is located at the second position, and wherein the second lockmember is located at a second lock-release position at which the secondlock member releases the lock of the developing cartridge with respectto the drum cartridge in the state in which the developing cartridge ismounted on the drum cartridge and the moving member is located at thefirst position.
 15. The image forming apparatus according to claim 1,wherein the drum cartridge further includes: a pressing member movablebetween a press position at which the pressing member presses thedeveloping cartridge toward the photoconductor drum and a press-releaseposition at which the pressing member releases the pressing with respectto the developing cartridge; and a press-releasing member allowing thepressing member to be located at the press-release position in the statein which the moving member is located at the first position, andallowing the pressing member to be located at the press position in thestate in which the moving member is located at the second position.